Concepts and mechanical assessment method for seismic landslide hazard: a review
Abstract
The Newmark displacement model is preliminarily used for quantitative seismic landslide hazard assessment in Chinese mainland. In order to distinguish concepts and promote the application of this mechanical model based assessment method,we firstly analyze the correlation of the narrow sense seismic landslide hazard forecast assessment and post-earthquake inversion assessment. In order to meet different landslide assessing requirements under earthquake emergency response, post-earthquake reconstruction and potential earthquake conditions,we preliminarily develop a generalized seismic landslide hazard assessment framework. Then,we review the theoretical foundation,basic assumptions,method classification and their applicability of seismic landslide hazard assessment method in association with Newmark model. Also,the latest progress of regional assessment method using simplified displacement is reviewed. Taking the rapid assessment for Wenchuan earthquake inducing landslide hazard as an example,we analyze uncertainties and spatial data problem which affect the effectiveness of assessment. We suggest the improvements to the mechanical model based seismic landslide hazard assessment. It should be noted that the coupled hazard assessment of potential earthquake and the inducing landslide needs to becarried out. Empirical seismic landslide displacement analyzing model applicable to Chinese mainland needs to be developed,so as to promote national seismic landslide hazard zoning.
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